Fabio Testi

Enrico Rosseni

Karin Baal

Herta Rosseni

Cristina Galbó

Elizabeth Seccles

Joachim Fuchsberger

Inspector Barth

Günther Stoll

Professor Bascombe

Claudia Butenuth

Brenda Pilchard

Camille Keaton

Solange Beauregard

Maria Monti

Mrs. Erickson

Giancarlo Badessi

Mr. Erickson

Pilar Castel

Janet Bryant

Giovanna Di Bernardo

Helen Edmonds

Vittorio Fanfoni

Enrico's Landlord

Antonio Casale

Mr. Newton

Antonio Anelli

Father Herbert

Rainer Penkert

Mr. Leach, the Headmaster

Carla Mancini

Susan, a Student

Joe D'Amato

CID Officer w / The Daily Telegraph (uncredited)

Alfonso Giganti

Man at Church (uncredited)

Charles Howerton

Phillip Sullivan (voice) (uncredited)

Maria Michi

Brenda's Mother (uncredited)

Alfred Vohrer

Edgar Wallace (voice) (archive footage) (uncredited)

Augusta Di Vincenzi

Woman in church (uncredited)